1791322635648 has 512 divisors, whose sum is σ = 6212767841280. Its totient is φ = 443783577600.

The previous prime is 1791322635643. The next prime is 1791322635679. The reversal of 1791322635648 is 8465362231971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791322635643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 339198768 + ... + 339204048.

It is an arithmetic number, because the mean of its divisors is an integer number (12134312190).

Almost surely, 2^{1791322635648} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1791322635648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3106383920640).

1791322635648 is an abundant number, since it is smaller than the sum of its proper divisors (4421445205632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1791322635648 is a wasteful number, since it uses less digits than its factorization.

1791322635648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5906 (or 5894 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 57.

The spelling of 1791322635648 in words is "one trillion, seven hundred ninety-one billion, three hundred twenty-two million, six hundred thirty-five thousand, six hundred forty-eight".